<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="https://cdn.bootcss.com/xlsx/0.15.6/xlsx.full.min.js"></script>
	</head>

	<body>
		<button onclick="downloadExl(jsono)">导出</button>
		<!--
            以下a标签不需要内容
        -->
		<a href="" download="这里是下载的文件名.xlsx" id="hf"></a>
		<script>
			var jsono = [{ //测试数据
				"保质期临期预警(天)": "adventLifecycle",
				"商品标题": "title",
				"建议零售价": "defaultPrice",
				"高(cm)": "height",
				"商品描述": "Description",
				"保质期禁售(天)": "lockupLifecycle",
				"商品名称": "skuName",
				"商品简介": "brief",
				"宽(cm)": "width",
				"阿达": "asdz",
				"货号": "goodsNo",
				"商品条码": "skuNo",
				"商品品牌": "brand",
				"净容积(cm^3)": "netVolume",
				"是否保质期管理": "isShelfLifeMgmt",
				"是否串号管理": "isSNMgmt",
				"商品颜色": "color",
				"尺码": "size",
				"是否批次管理": "isBatchMgmt",
				"商品编号": "skuCode",
				"商品简称": "shortName",
				"毛重(g)": "grossWeight",
				"长(cm)": "length",
				"英文名称": "englishName",
				"净重(g)": "netWeight",
				"商品分类": "categoryId",
				"这里超过了": 1111.0,
				"保质期(天)": "expDate"
			}];
			var tmpDown; //导出的二进制对象
			function downloadExl(json, type) {
				var tmpdata = json[0];
				json.unshift({});
				var keyMap = []; //获取keys
				//keyMap =Object.keys(json[0]);
				for (var k in tmpdata) {
					keyMap.push(k);
					json[0][k] = k;
				}
				var tmpdata = []; //用来保存转换好的json 
				json.map((v, i) => keyMap.map((k, j) => Object.assign({}, {
					v: v[k],
					position: (j > 25 ? getCharCol(j) : String.fromCharCode(65 + j)) + (i + 1)
				}))).reduce((prev, next) => prev.concat(next)).forEach((v, i) => tmpdata[v.position] = {
					v: v.v
				});
				var outputPos = Object.keys(tmpdata); //设置区域,比如表格从A1到D10
				var tmpWB = {
					SheetNames: ['mySheet'], //保存的表标题
					Sheets: {
						'mySheet': Object.assign({},
							tmpdata, //内容
							{
								'!ref': outputPos[0] + ':' + outputPos[outputPos.length - 1] //设置填充区域
							})
					}
				};
				tmpDown = new Blob([s2ab(XLSX.write(tmpWB, {
						bookType: (type == undefined ? 'xlsx' : type),
						bookSST: false,
						type: 'binary'
					} //这里的数据是用来定义导出的格式类型
				))], {
					type: ""
				}); //创建二进制对象写入转换好的字节流
				var href = URL.createObjectURL(tmpDown); //创建对象超链接
				document.getElementById("hf").href = href; //绑定a标签
				document.getElementById("hf").click(); //模拟点击实现下载
				setTimeout(function() { //延时释放
					URL.revokeObjectURL(tmpDown); //用URL.revokeObjectURL()来释放这个object URL
				}, 100);
			}

			function s2ab(s) { //字符串转字符流
				var buf = new ArrayBuffer(s.length);
				var view = new Uint8Array(buf);
				for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
				return buf;
			}
			// 将指定的自然数转换为26进制表示。映射关系：[0-25] -> [A-Z]。
			function getCharCol(n) {
				let temCol = '',
					s = '',
					m = 0
				while (n > 0) {
					m = n % 26 + 1
					s = String.fromCharCode(m + 64) + s
					n = (n - m) / 26
				}
				return s
			}
		</script>
	</body>

</html>
